Police have arrested a man allegedly considered one of the largest heroin dealers in the Southern Maryland area on charges including drug possession after a three-month investigation.

Steven D. Taylor, 28, of Scotland, Md., was arrested June 14 on charges of heroin possession, possession of a large amount of heroin and possession of heroin with intent to distribute.

He was released June 17 from the Calvert County Detention Center after posting his $75,000 bond.

Between March 3 and June 13, the Calvert County Drug Enforcement Unit began investigating Taylor, according to charging documents.

During that time, Maryland State Police Prince Frederick barrack troopers arrested another man on drug possession charges. After obtaining a search and seizure warrant for that man’s cellphone records, police found several text messages between that man and Taylor referencing drug sales and “other drug related information,” police said.

Several confidential informants told police where Taylor lived and that he is “known as one of the largest heroin dealers in the Southern Maryland area,” charging documents state. They also told police Taylor is “known to carry a firearm when traveling to ‘re-up’ on heroin,” police said.

The Drug Enforcement Unit conducted mobile surveillance on Taylor “around Southern Maryland” on June 13. According to charging documents, Taylor was seen driving his 2003 silver Ford Expedition and seen stopping at several houses “known to the DEU to be involved with the sale of heroin.” Taylor also was allegedly seen conducting “hand-to-hand” drug sales with two men in an SUV, police said.

With the assistance of the Calvert County Sheriff’s Office, the DEU conducted a traffic stop on Taylor’s vehicle. A probable cause search of Taylor’s vehicle was conducted, during which 100 grams of heroin were found in the engine compartment, charging documents state. Police said Taylor possessed a large amount of cash on his person and in different individually bundled folds.

After allegedly waiving his Miranda rights, “Taylor admitted to dealing heroin, and to acquiring large sums of money as a result,” according to charging documents.

Online records show Taylor has been arrested in three counties in Maryland on drug related charges in previous years.

In Montgomery County District Court, Taylor was convicted in 2011 of possession of drug paraphernalia and fined $97.50. In 2005, in St. Mary’s County Circuit Court, Taylor was found guilty of possession of marijuana and fined $500. In Calvert County District Court, Taylor was found guilty of possession of marijuana in 2004 and given a time-served jail sentence of one day.